1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c7df9e6274bf4448c75d733d42f34e92574347f34ba5f2833f261bcad7d2f13. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dfcf2c02-b868-43f0-a355-32e274c55170.json and https://artists.proofprofile.net/proofs/artist/dfcf2c02-b868-43f0-a355-32e274c55170.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331018915436ee4846d8667c43275beb40f5ce64dfe59811e296f619a161a864. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/COF018901009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x264273e488d4dbdfb2c1615150b47f793edba01a6e1177fcfa8eaa18ca8d29b9. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/COF018902630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e89a03a9a147fe34bcf3dd2cf3128a18799d56c717eba5e4cdb78731e6d0796. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/COF018901289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ff4a78d7fd842fa0789d45e1f4c97532bece67c52966477cec57b89ca1162b. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/COF019603524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fac694d75870091da003cc4cc1a4398ca1dd390249e76870735a4d009d2fa92. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:26:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/COF018900762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc76b57d62edefab681af6b66b006ee568b570cdc3d47b8af1cdedc5eb2262e3. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/COF018902121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa72894602a74df4a9f72c074e4383e7f1180f443aeed1c5fd8fab51b1564e902. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/COF019403603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e89a03a9a147fe34bcf3dd2cf3128a18799d56c717eba5e4cdb78731e6d0796. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/COF018901289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74c65463d2e32800990136e25e40013fb52e21888ae6dade0b326eedd94def0. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:50:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/COF019603516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf80865295cd38ab8c7c93f1021da68552cbbdd35fbb459c523272159f59ad1b7. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/COF018902225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ff4a78d7fd842fa0789d45e1f4c97532bece67c52966477cec57b89ca1162b. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/COF019603524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fac694d75870091da003cc4cc1a4398ca1dd390249e76870735a4d009d2fa92. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/COF018900762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc76b57d62edefab681af6b66b006ee568b570cdc3d47b8af1cdedc5eb2262e3. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:29:24Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/COF018902121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9355a68e1c329156f35ac75ec62f63a4fb86fce5c3ab48b78086e9dd882ea9cd. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/COF018807890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e1fdc84ffac96c45909849e05edf8d2dfcaf4fdafb7c40614278794a4ca4d3. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T08:33:50Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/COF019001917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e87b5d5ca0dcde195fc5dfb0f816079a59501c651e4053ca5100f453ca00f37. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/COF018809081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822d3ccfa92ec5c699e08c0aa7b4697d836ddb9b1821389c36af1ebffd0ab940. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/COF019002312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a773ddb26e64cf2d3190adec07058537566465e3245f00d5ca2b8b1702526f0. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/COF019200444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331018915436ee4846d8667c43275beb40f5ce64dfe59811e296f619a161a864. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/COF018901009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf80865295cd38ab8c7c93f1021da68552cbbdd35fbb459c523272159f59ad1b7. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/COF018902225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e8b459fbc2a7efff1f892c1d2c1cadf15d725b8d631cd406e1240338e429ca. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/COFC10001909.